Bending-machine.



J. A. GERLOGK.

BENDING mama.

. ARBLIVOATIOH FILED JUNE 23, 1908.

Patented Jan. 19, 1909.

2 SHEETS-SHEET 1.

J. A. GERLOGK BENDING MACHINE.

APPLICATION FILED JUNE 23, 1908.

Patented Jan.19,1909.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT onrion.

JOHN A. GERLOCK, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO JOHN NAZEL,OF PHILADELPHIA, PENNSYLVANIA.

BENDING-MA CHINE To all whom it may concern:

Be it known that I, JOHN A. GERLooK, a citizen of the United States,residing in the city of Philadelphia, county of Philadelphia, and Stateof Pennsylvania, have invented certain Improvements in Bending-Machines.

This invention relates to machinery for bending metal bars and it isparticularly designed for producing metal shapes used in reinforcedconcrete.

The characteristic features of the invention will fully appear from thefollowing de scription and the accompanying drawings in illustrationthereof.

In the drawings, Figure 1 is a plan View of mechanism embodying theimprovements of my invention; Fig. 2 is a plan view of mechanism similarto that shown in Fig. 1, parts of the two constructions being arrangedreversely with relation to each other; Fig. 3 is a vertical sectionalview of the ma chine, and Fig. 4 is a plan view showing a modifiedconstruction.

In the preferred construction, shown in Figs. 1 to 3 inclusive, themechanism comprises the reversely formed beds 1, 1, each carried bywheels 2, 2' which move on the rails 3 so that the beds with themechanism carried thereby can be varied in position and adjusted withrelation to each other.

The beds '1, l are provided respectively with the rockers 4, 4 havingfulcrums in the pins 5, 5 on which they are adapted to oscillate.Rollers 6, 6 are journaled by means of these pins and adjacent to suchrollers are rollers 7, 7, journaled in brackets 8, 8', the bracketsbeing adjustably engaged to the rockers by means of the ways 9, 9 in therockers, the holes or slots 10, 10 in the brackets, and the bolts 11,11. Further brackets 12, 12 carry rollers 13, 13, these brackets beingengaged to the rockers by means of the ways 9, 9 in the rockers,

the holes or slots 14, 14 in the brackets, and the bolts 15, 15connecting them. Bearing blocks 16, 16' have slots 17, 17 therein bywhich they are adjustably engaged to the beds by means of slots 18, 18therein and the bolts 19, 19; and fixed to the blocks are the brackets20, 20 carrying the rollers 21, 21, the brackets being adjustable bymeans of the holes or slots 22, 22 therein, the ways 23, 23 in theblocks and the connecting bolts 24, 24.

Specification of Letters Patent.

Application filed June 23, 1908.

Patented Jan. 19, 1909.

Serial No. 439,912.

The rockers are connected respectively, by journaled connections throughpins 25, 25, with pitmen rods 26, 26 which are journaled on the crankpins 27, 27 of the crank arms 28, 28, the latter being fixed to wheels29,

29. The pins 27, 27 are connected with the respective arms throughblocks 27 adjustable by means of screws 27, whereby the working lengthof the arm, the stroke of the pitman and that of the rocker can bevaried. The wheels 29, 29 are provided with the dogs 30 which areadapted to engage ratchet wheels 31, the latter being fixed to and revoluble with bevel gears 32. Bevel pinions 33, splined on the revolubleshaft 34, engage and revolve the bevel gears and ratchet wheels so as torevolve the crank arms to oscillate the rockers, the ratchet mechanismpermitting each of the crank arms to be moved in the reverse direction,to elevate the rockers, by turning the hand wheels 29, 29.

A bar 35, which is to be bent, is pushed over the tables, between therespective rollers 6, 7, and 6, 7. The bar being in position, therevolving shaft 34 acts through the intermediate mechanisms to revolvethe cranks 28, 28, and turn down the rockers 4, 4 on their hinges. Therollers 13, 13, carry the intermediate section of the rod to the dottedline position, down to the limiting rollers 21, 21, while the rollers 7,7 roll the rod over the rollers 4, 4; hubs 36, 36 on the respectivetables acting with the rollers 7, to hold the ends of the rod againstlateral movement.

As shown in Fig. 4, there may be used a table 40 on which is fixed ananvil or work holder 41 having the parallel jaws 42 forming a channel43, the anvil having the beveled face 44. Connected to the table by ahinge 45 is a rocker 46 having the parallel jaws 47 forming a channel 48adapted to be brought into line with the channel 43, the rocker havingthe oppositely disposed beveled faces 49 and 50. Connected to the rocker46 by a hinge 51 is a rocker 52 having the jaws 53 forming a channel 54adapted to be brought into line with the channels 43 and 48. A pitman 55is pivotally connected by a pin 56 with the rocker 46 and by a crank pin57 with the revoluble crank wheel 58 journaled in the table. Rollers 59carried by the table limit the movement permitted to the rockers 46 and52 by reason of their are hinged connections. WVith the several channelsin alinement a bar to be bent is placed therein and on revolving thecrank mechanism the rockers are carried to the dotted line position,correspondingly bending the bar held between the aws thereof.

It will be understood that instead of bending down the middle of thebar, as illustrated in Figs. 1 and 2, the relation of the duplicatemachines there shown may be reversed, so that the ends of the bar shallbe bent away from the middle.

Having described my invention, 1 claim:

1. A bendin machine comprising a bed, a rocker adapter to oscillatethereon, crank mechanism having a movable connection with and adaptedfor oscillating said rocker, and means for holding a section of rodwhile an adjacent section thereof is subjected to the, bending act-ionof said rocker.

2. A bending machine comprising a bed, a rocker adapted to oscillatethereon, roller mechanism carried by said rocker, crank mechanismconnected with and adapted to operate said rocker, means for holding arod during the bending action thereon of said roller mechanism, andmeans for limiting the bending movement of said rod.

3. A bending machine comprising a bed, a

rocker adapted to oscillate thereon, a roller having an axis common tosaid rocker, a bending roller connected in adjustable relation to saidrocker, a limiting roller connected in adjustable relation to said bed,and a hub on said bed, said hub coacting with said roller first named tohold a rod section while an adjacent section thereof is carried by theaction of said bending roller into contact with said limiting roller.

4:. A bending machine comprising a bed, a rocker having a connectionwith said bed uponwhich it is adapted to oscillate, away In said rocker,a bracket having an ad ustable connection with said way, a roller carried by said bracket, a pitman connected with said rocker, a crankconnected with said pitinan, and means for revolving said crank.

A bending machine comprising a bed, a rocker having an axis ofoscillation on said bed, a roller revoluble upon saidaXis, a pair ofbending rollers adjustable along said rocker, and crank mechanism foroscillating said rocker. V

6. A bending machine comprising a pair of beds each having anoscillating rocker thereon, a crank mechanism having a movableconnection with and adapted for operating each of said rockers, arevoluble shaft, and'mechanisms whereby said shaft is connected witheach of said crank mechanisms.

7. A bending machine'comprising a'bed, a block connected thereto, alimiting roller adjustably connected to said block, a rocker connectedto said block, a roller revoluble about the axis of oscillation of saidrocker, one or more bending rollers adj ustably connected with saidrocker, a pitman connected to said rocker, a crank connected to saidpitman, and means for revolving said crank.

8. A bending machine comprising a bed, a revoluble crank, a pitmanreciprocated by said crank, means fixed to said bed for holding a rod,and a rocking device connected with said pitman for bending said rod.

In witnesswhereof I have hereunto set my name this 22nd day of June, A.D. 1908, in the presence of the subscribing witnesses.

Jos. G. DENNY, Jr.

